Steel X12CrMo5
EN X12CrMo5
X12CrMo5 (1.7362, A182 F5) is a martensitic 5 % Cr-Mo steel for elevated-temperature valve and flange components, supplied isothermally annealed (+I), normalized and tempered (+NT) or quenched and tempered (+QT).
Reference datasheet — X12CrMo5 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the +NT condition
X12CrMo5 tempers and conditions
X12CrMo5 is supplied in 3 conditions, soft to hard. +NT is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Isothermally annealed | Choose for maximum machinability of forgings/bars before final heat treatment, or where only ASTM A182 F5 minimum properties are required. | 320 | 530 | 25 | 165 HB | — |
+NTDefault Normalized and tempered | Standard supply condition for pressure-retaining forgings, flanges and valve bodies working 400–600 °C; balanced strength, toughness and creep life. | 460 | 660 | 21 | 17 HRC | — |
Quenched and tempered | Choose for high-strength bolting, studs and heavy valve trim where minimum yield above ~420 MPa is specified; tempering above 650 °C keeps creep and temper-embrittlement behaviour acceptable. | 540 | 720 | 18 | 22 HRC | — |
What is X12CrMo5?
X12CrMo5 (1.7362, A182 F5) is a martensitic 5 % Cr-Mo steel for elevated-temperature valve and flange components, supplied isothermally annealed (+I), normalized and tempered (+NT) or quenched and tempered (+QT). Typical properties are 460 MPa yield, 660 MPa tensile, 21 % elongation and 195 HB (17 HRC), with a maximum service temperature of 600 °C and good creep resistance in forged bodies, flanges and fittings. Corrosion resistance is limited (score 25) — it is not stainless — and both welding (score 40) and cold forming (score 32) are restricted by the hardening martensitic matrix. Use 13CrMo4-5 for easier welding at lower temperatures, or a 9Cr grade such as P91 for higher creep demands. X12CrMo5 has a density of 7.78 g/cm³ (0.281 lb/in³), lighter than 91% of steel grades. It melts at 1,425°C (2,597 °F). X12CrMo5 has a yield strength of 460 MPa (66.7 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 55% of steel grades. Elongation at break is 21% and the elastic modulus is 213 GPa (30.9 Msi).
What is X12CrMo5 used for?
- valve bodies
- flanges
- high-temperature fittings
Advantages
- High service temperature — 600°C (1,112 °F), better than 98% of steel grades
- Good corrosion resistance — 25/100, better than 92% of steel grades
Limitations
- Low electrical conductivity — 3 % IACS, worse than 91% of steel grades
X12CrMo5 properties
Typical room-temperature values for X12CrMo5-+NT; bars are the position among steel grades.
Physical3
X12CrMo5 has a density of 7.78 g/cm³ (0.281 lb/in³), lighter than 91% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
X12CrMo5 has a yield strength of 460 MPa (66.7 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 55% of steel grades. Elongation at break is 21% and the elastic modulus is 213 GPa (30.9 Msi).
Thermal6
X12CrMo5 is rated for continuous service to 600°C (1,112 °F). It conducts heat at 37 W/m·K (21.4 BTU/hr·ft·°F), worse than 71% of steel grades. Thermal expansion is 11.3 µm/m·K (6.28 µin/in·°F).
Electrical3
X12CrMo5 conducts electricity at 3 % IACS, worse than 91% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (25/100), better than 92% of steel grades.
Sustainability4
Producing a kilogram of X12CrMo5 takes about 32 MJ of energy and emits 2.3 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 35%.
Manufacturability8
X12CrMo5's machinability is fair (53/100, better than 53% of steel grades); weldability fair (40/100); formability poor (32/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. X12CrMo5 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with X12CrMo5
Is X12CrMo5 easy to machine?
Machine in the annealed or N+T condition with rigid setups, sharp carbide (coated grades) and generous coolant; the 5%Cr matrix work-hardens and is abrasive, so cut speeds roughly 55–60 % of AISI 1212.
Can X12CrMo5 be welded?
Weldable with matching 5Cr-0.5Mo (E502/ER80S-B6) consumables, but requires 200–300 °C preheat/interpass, low-hydrogen practice and PWHT at 700–760 °C to avoid hard martensite and hydrogen cracking.
Can X12CrMo5 be formed, bent or molded?
Hot forge at 1100–1180 °C, finish above 900 °C and cool slowly or normalize; cold forming is limited to gentle bends because of high yield ratio and quench-hardening tendency.
X12CrMo5 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| C≤0.15 % per EN 10222-2 / ASTM A182 F5 | 0.08 – 0.15 | 0.12 |
| Si | ≤ 0.5 | 0.3 |
| Mn | 0.3 – 0.6 | 0.45 |
| P | ≤ 0.03 | 0.02 |
| S≤0.015 % for high-purity/pressure grades | ≤ 0.02 | 0.01 |
| Cr | 4 – 6 | 5 |
| Mo | 0.45 – 0.65 | 0.55 |
| Niresidual | ≤ 0.3 | 0.15 |
| Fe | balance |
What surface finishes work on X12CrMo5?
Not stainless — protect with phosphating plus high-temperature paint, aluminizing or thermal spray for outdoor/wet service; electroplating requires stress-relief bake to avoid hydrogen embrittlement.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel X12CrMo5 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.7362
- Similar grades
- A182 F5
How much does X12CrMo5 cost?
X12CrMo5 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
X12CrMo5 — frequently asked
What is X12CrMo5 used for?
X12CrMo5 is typically used for valve bodies, flanges and high-temperature fittings. In short: 5 % Cr creep steel; rated to 600 °C; needs preheat and PWHT.
What is the yield strength of X12CrMo5?
X12CrMo5 has a typical yield strength of 460 MPa (66.7 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 55% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is X12CrMo5 easy to machine?
Reasonably — machinability is rated fair (53/100, better than 53% of steel grades). Machine in the annealed or N+T condition with rigid setups, sharp carbide (coated grades) and generous coolant; the 5%Cr matrix work-hardens and is abrasive, so cut speeds roughly 55–60 % of AISI 1212.
Can X12CrMo5 be welded?
With care — weldability is rated fair (40/100). Weldable with matching 5Cr-0.5Mo (E502/ER80S-B6) consumables, but requires 200–300 °C preheat/interpass, low-hydrogen practice and PWHT at 700–760 °C to avoid hard martensite and hydrogen cracking.
What surface finishes work on X12CrMo5?
Not stainless — protect with phosphating plus high-temperature paint, aluminizing or thermal spray for outdoor/wet service; electroplating requires stress-relief bake to avoid hydrogen embrittlement.
Can X12CrMo5 be formed, bent or molded?
Hot forge at 1100–1180 °C, finish above 900 °C and cool slowly or normalize; cold forming is limited to gentle bends because of high yield ratio and quench-hardening tendency.
What is the maximum service temperature of X12CrMo5?
X12CrMo5 is rated for continuous use to about 600°C (1,112 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does X12CrMo5 cost?
X12CrMo5 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 10222-2 — Steel forgings for pressure purposes, ferritic and martensitic steels with elevated-temperature properties — CEN (2017)
- EN 10269 — Steels and nickel alloys for fasteners with specified elevated/low temperature properties — CEN (2013)
- ASTM A182/A182M — Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Fittings, Valves and Parts (Grade F5, F5a) — ASTM International (2022)
- GB/T 3077 — (12Cr5Mo) — SAC (2015)
- ASME BPVC Section II Part D — Material Properties (5Cr-1/2Mo) — ASME (2023)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Mysteel / 1688 (2025)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.